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Production of the charmed baryon Λ +c in neutron-proton interactions

BIS-2 collaboration

  • Published:
Czechoslovak Journal of Physics B Aims and scope

Abstract

In this paper we study the inclusive production of the charmed baryon Λ +c in interactions of 40–70 GeV/c neutrons with protons of hydrogen target. The experiment has been performed with the use of magnetic spectrometer BIS-2 located in the neutron beam of Serpukhov accelerator. The signal of Λ +c is observed in the effective mass spectra of Λ°π+π+π. After the removal of interactions occurring on the container of liquid hydrogen, the signal consists of 14 combinations corresponding to ≈4 standard deviations of background. Its mean value is 2262 MeV/c2, width of the bin containing signal is 20 MeV/c2. On the basis of this signal we determine the value of cross section of Λ +c production times the branching ratio of its observed decay modeσ. Br (Λ +c → Λ°π+π+π)=0·26±0·11 μb in the kinematic region ofx F>0·5 andp T<1 GeV/c.

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Vecko, M., Novák, M., Hladký, J. et al. Production of the charmed baryon Λ +c in neutron-proton interactions. Czech J Phys 39, 297–307 (1989). https://doi.org/10.1007/BF01597781

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  • DOI: https://doi.org/10.1007/BF01597781

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